Spring device



D. B. DAVIS.

SPRING DEVICE.

APPLICATION FILED NOV. 3,1919.

Patented Aug. 10, 1920.

5! 1mm Moz D. B.Davzs.

UNITED STATES PATENT. OFFICE.

DANIEL IB. DAVIS, 01 MARION, INDIANA.

SPRING DEVICE,

To all whom it may concern:

Be it known that I, DANIEL B. DAVIS, a citizen of the United States, residing at Marion, in the county of Grant and State of Indiana, have invented a new and useful Spring Device, of which the following is a specification.

This invention relates to improvements in switches, and has for its primary object, to provide a novel form of contact making device, particularly designed for use in connection with ignition systems, of internal combustion engines.

The primary object of the invention is to provide means to be attached to the brush of a timer, for converting the usual wheel contact member of the brush commonly employed with the Ford timer, into a wiping contact member.

A further object of the invention is to provide a device of this character which will insure the brush running smoothly within its housing, thereby eliminating all unnecessary noises caused by rattling of the roller, now in use as the contact member.

A further object of the invention is to provide an attachment which will conform to the general design, of the brushes now in use, and one which will be readily and easily snapped into position thereon.

A still further object of the invention, is to provide a brush which, in operation, will set up a sweeping action on the contact points, associated therewith, to present bright, clear contact points at all times, thereby insuring a true contact between the points of the timer.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed without departing from the spirit of the invention.

Referring to the drawings Figure 1 illustrates a plan view of a timer constructed in accordance with the present invention, the cover thereof being removed.

Fig. 2 is a side elevational view of the rotary brush, member with the invention applied thereto.

Fig. 3 is a transverse sectional view.

Specification of Letters Patent. Patented A 10 1920 Application filed November 3, 1919.

Serial N 0. 335,408.

Fig. 4 is a sectional view taken on line 4.-1 of Fig. 1.

Having reference to the drawings in detail, the reference character 5 designates the body or casing of the timer, which is provided with the usual contact points 6, secured to the inner walls of said body 5, by means of the threaded bolts 7, and conductor terminal securing nuts 8.

Within the housing 5, is the usual brush member 9, which is provided with a tubular shaft 10, by which the rotary member 9, is secured to the cam shaft, not shown.

This rotary brush member 9, also includes laterally extending arms 11, and an arm 12 pivotally connected to said arms, by means of shaft 13, said arm 12 operating against the tension of the spring member 14, which has one of its ends engaging the tubular shaft 10, the opposite end thereof being coiled around the shaft 13, one end of the spring being anchored to the shaft. The arm 12, which has connection with the shaft 13, to move therewith, is consequently placed under the tension of the spring 14, since movement of the arm toward the shaft 10, moves the spring 14 relatively.

It will therefore be seen that pivotal movement of the arm 12, with relation to the arm 11, is restricted by the tension of the spring member 14:.

Disposed between the forked ends 15, of the arm 12, is the contact wheel 16, which is disposed in such a position that the same will engage the contact points 6 of the timer casing 5, when the brush member is rotated within the casing, thereby distributing electric current to the various cylinders of the engine used in connection with the timer.

The device forming the subject matter of the present invention, includes the arm 17, which has one of its ends curved as at 18, the extreme end thereof being provided with a shoulder 19, which shoulder engages within the notched portion 11' of the tubular shaft 10, for holding the arm 17 into position on the shaft 10, the curved portion 18 of the arm 17, being such that the same will closely engage the shaft 10.

The opposite, or free end 20 of the arm 17 extends upwardly terminating at a point in close proximity with one surface of the roller contact member 16, and is provided with an enlargement 21, secured to one of the flat surfaces thereof, and in such relation with the contact member 6 1 that when the rotary element, with the a tachment applied, is positioned within the casing 5 of the timer, the enlargement 21 which new forms the contact point, forces the wheel 16 toward the power shaft 10, and the wheel 16 is consequently held out of contact with the inner wall of the casing 5.

A lug 22, which is in the form of a pin having a head 23, is carried by the arm 17, on the under surface thereof, and is of alength to extend the entire distance between the arms 11, whereby lateral movement of the arm 17, with relation to the arms 11, absolutely prevented. i

It might be further stated that the' device, which includes the arms 17, 18 and free end 20 of the arm 17, are constructed of substantially flat spring metal, so that the same will have a certain amount of resiliency, to hold the same to the usual rotating brush member of the ordinary timer now in use.

Having thus descril is claimed is ed the invention, what 1. In combination with the rotary brush thereof, and means carried by the brush carrying arm and engaging the supporting arms of the rotary brush, for preventing lateral movement of the brush carrying member with relation to the arms.

2; In combination with the rotary brush member of a timer, and the supporting arms thereof, a brush carrying member including an arm of relatively flat flexible material, said arm having curved end sections, means for securing the brush carrying member to the supporting arms of the rotary brush member, and a lug carried by the brush carrying member for engaging said supporting arms for'preventing lateralmovement thereof, with relation to the supporting arms.

3. In combination with the rotary brush member of a timer, and the supporting arms thereof, a detachable brush supporting member including an arm of flexible material, means on said arm for securing the detachable brush supporting member to the supporting arms, and a wiping contact member carried by the detachable brush supporting member.

In testimony that I claim the foregoing as my own, I have hereto aiiixedmy signature in the presence of two witnesses.

DANIEL B. DAVIS.

Witnesses G120. M. Coon, JACOB M. BARNARD. 

